import requests
session = requests.Session()
url = 'https://httpbin.org/headers'
access_token = {
'Authorization': 'Bearer {access_token}'
}
session.headers.update(access_token)
response1 = session.get(url)
response2 = session.get(url)
print('response1: ', response1.json()['headers']['Authorization'])
print('response2: ', response2.json()['headers']['Authorization'])